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Ulnar head of extensor carpi ...
Other Terms:
Caput ulnare musculus extensoris carpi ulnaris
Muscle parts
Humeral head; Ulnar head
Latin name
Musculus extensor carpi ulnaris
Latin muscle parts
Caput humerale; Caput ulnare
Group
Antebrachial muscle – posterior compartment – lateral group
Etymology
In English this muscle’s name is the muscle on the ulnar side that straightens the wrist. The word extensor comes from the Latin ex meaning “out from” and tendere meaning “to stretch.” Carpi is the genitive form of the Latin carpus meaning “wrist.” Ulnaris is used in reference to the muscle’s position on the ulnar side of the forearm. This term comes from the Latin ulna meaning “elbow,” which is derived from the Greek olene.
Origin
Lateral epicondyle of humerus via common extensor tendon and from the posterior border of the ulna
Insertion
Medial side of the base of the 5th metacarpal bone
Action
Extension of the wrist; adduction (ulnar deviation) of the wrist
Nerve supply
Radial nerve (C7 and C8)
Blood supply
The recurrent interosseous branch of the posterior interosseous artery and the posterior interosseous artery itself provide blood to the muscle.
Latin
Caput ulnare musculus extensoris carpi ulnaris
